Teeth especially painful at night may be the emergence of acute pulpitis, the attack of nocturnal pain, pain can not be localized characteristics or the occurrence of acute gingival papillitis. 1. Acute pulpitis: when tooth decay appears pulpitis, acute attack of teeth will appear nocturnal pain, and the pain is severe, usually can not locate the affected tooth, acute pulpitis can go to the hospital root canal treatment to extract the pulp to relieve pain. 2. Acute gingival papillitis: After dinner, if the food is embedded and not cleaned up in time, acute gingival papillitis can occur, which can be seen between the teeth embedded food, gingival papillae inflammation, redness and swelling, the teeth have spontaneous pain, and the general removal of embedded material after the pain can be significantly relieved. Teeth especially painful at night should go to the hospital to check whether the dentition or periodontal disease, if found problems timely treatment.